Chip blower for dentists



L. SOBOL'AND G. M. MARR. CHIP BLOWER FOR DENTSTS.

APPLlcmoN FILED mw e. i919.

1,416,241'. y Patented May16,1922.

UNITED STATES PATENT OFFICE.

LEO soBoL AND enomiir,y M. MARR, or BROOKLYN, NEW YORK.

CHIP BLOWER FOR DENTISTS.

To all 'whom t may concern? Be it known that we, Dr. Luo SooL, a citizen of the United States, and resident of the borough of Brooklyn, county of Kings, city and State of New York, and GEORGE M.

'MARn, a citizen of the United States, and

resident of the borough of Brooklyn, county of Kings, city andState of New York, have invented certain new and useful Improvements in Chip Blowers for Dentists, of which the following is a specification.

This invention relates to improvements in chip blowers for dentists andthe principal object of the invention resides in a provision of a means attached to the blower for heating the air passing therethrough.

Another ob] ect of the invention is to provide a supporting means for the heater and for the bulb of the blower so that the same "may be held against accidentaldisplacement.

` `Still another object of the invention is to provide a device which maybe readily attached to the ordinary type ofl blower with but a slight alterationV in the construction thereof.

As a further obiect the invention contem-l plates the' provision of a heating element comprising a lava core wound on its exterior with suitable wire such as nikrome which will be readily heated upon the passage of electrical current therethrough and. a provision of a means within the core for breakingup the air current passing therethrough in order that it may be more readily heated.

The following is what we consider a good means of carrying out this invention and the accompanying drawings should be referred to for a complete understanding of 'the specification which follows through the heating core illustrating a modified forni of device for causing the air passing through the core to closely contact with the exterior thereof in order that it may be readily heated.

'therewith and `extending Specification of Letters Patent. Ptentd Igny 16, 1922.

Application filed May 6, 1919. -Seial No. 295,250.

Similar referencexnumerals indicate like parts in all of the figures where they appear..

Referring to the drawings by thecharacters of reference, the numeral 1 designates as an entirety, a chip blower which consistsof a bulb 2 which is preferably of rubber or a. similar flexible material and the nozzle 3. The bulb 2 is provided at its forward end with a fitting 4 into which the lnozzle is threaded or otherwise secured.

At the inner end of the fitting f1 is a valve seat with which the ball valve 5 co-operates in closing the outlet passage of the device yvhen the bulb is returning to extended posi- The opposite end of the bulb is provided l with a fitting 6in which the'ball valve 7 is operable and this valve closes the passage through the fitting when the bulb is compressed. It will thus bey seen that air passf" ing .through the bulb will travelin one direction. It will be noted that the fitting 6 vis preferably elongated and provided adj acent its outer end with. an enlarged bore 8y having radiating passages 9 communicating" through rthe side walls of the iitting.`

In the preferred form of the invention the heater is 'designated generallyby the numeral 10and consists of an outer shell 11 vformed at its forward end with a reduced collar 12 `which is adapted to slip over and frictionallyv engage the fitting 6. The opposite end of the shell is provided with a central aperture which is surrounded by an outwardly extending iange 18. larly disposed row of intake apertures '14 are Varranged in the rear end wall of the casing and fitting into the flange 13 is a cylindrical extension 15 formed integrally with the core 16. `The opposite terminal `of the core is provided with a relatively short cylindrical extension 17 which is adapted to enter the enlarged bore 8 in the fitting 6 previously described.`

Extending 4longitiidinally through the core and the extensions thereof is an air intake passage 18 as willbe clearly seen upon reference :toF-igurev 2.V Arranged near the An annuunder side of the casing 11 and in the rear end wall thereof is an insulating bushing 19 through which the feed wires 2() of the heating coil enter the casing. These feed wires are connected to opposite terminals of the coil 21 which is wound upon the core and is formed of a suitable conductor which is readily heated by the passage oit current therethrough'.

In order to support the heater il) and the blower l in proper relation metallic strip or base 22 is provided to which the shell ill may be attached in any desired manner. rllhe forward end of the base S22 provided with an arcuate extension or seat 2?) 'for the accommodation of the bulb 2. The extreme forward end oit this seat projects upwardly and is bent to torni an ear Qfl having an aperture 25 therethrough ttor the reception oit the nozzle lt will thus be seen that the heater and chip blower will be held in proper aline- .ment and against accidental displacement.

Formed at the extreme rear end ot the base 22 is an upturned ear 2G in which a suitable bushing 27 is secu red through which the iteed wires 2O pass. la order to break up the air entering the passage 'lf-l, a plurality ot' screens 2S are arranged transversely of the passage and are preferably formed of copper wire or a similar material which will readily conduct heat. it will be underr'etood however, that ii' so desired a core S29 may be inserted in said passage and supported centrally thereof by suitable radial arms 3() and in this lorin olf the device it will be seen thatv the air will be caused to create a thin film adjacent the wall of the passage 18 so as to readily absorb the heat 'from the core 16.

ln the modilied liorm ol the invention illustrated in Figure 3, the base is eliminated and the heater designated by the numeral :El is fitted on the nozzle il. In this term oit heater a bushin 32 'lor the inlet of Vthe wires 38 is provided in the side wall ol the heater and the apertures in the end wall oit .'aid heater are dispensed with.

ln operation it will be seen that current flowing through the wires @il will heat the coil 2l thereby heating the core l@ and upon connnessing the bulb it will be evident that air will be drawn in through the passage 1 8 and the openings 'lt so that circulation will. be created around the exterior and through the interior ot the core. The air passing around the erterioi` o i tl e core will enter the passage through the iilfliluly tl by means o'l' the radiating' openings fl and when the bulb returns to extended i'iosition the valve 'i will be unseated so that the vacuinn within the bulb created by its return, will be displaced by iarm air entering from the heater. llpon compressing the ball it will be evident that ythe valve T will be seated and the valve 5 unseated so that the warm air contained within thebulb will be ilorced out th ougn the nozzle 3. Y

ln this way it will be seen that the usual. practice ot heating the nozzle by holding the same over an ordinary Bunsen burner or al.-

4cohol heater will be eliminated and a much more eil'hcicnt and convenient device provided.

lt will be understood 'that in the modiiied torni oi? the device illustrated in Figure 3, the valves may be dispensed with and the air iorced through the nozzle 3 will beeomeheated after leaving the bulb by its passage through the heater 3l.

@their modifications may be made within the scope of the appended r aims without dcparting` Yfrom the principle or saeriticing the advantages o'l`V the invention.

ll'7 hat we claim issl. A dental chip blower inchullngI a bulb, a nozzle attached to the bnlb an electrical lieating core connected to the intake side ot the bull, the core having` a passage vtherethrough communicating with the bulb and a shell surrinunfling the core and communicating with the bulb whereby air passing through the core and through the shell will be heated prior to its entrance into the bulb.

dental chip blmrer comprising a bulb, al nozzle connected to the bu`lb a core connected. to the bulb7 said core having a passage thereto communicating with the bulb, an electrical heatingl element Wound upon the core and means in the passage through the core for causing the air passing therethrough to be readily heated.

3. .fir dental chip blower con'ipriuing a bulb, a nozzle, i base connected with the nozzle and supporting the bulb, an electrical heater suppin'led on the base, a l'ieating coil within the heater whereby air entering the heater will be 'armed prior to its entrance into the bulb.

l-. A dental chip blower comprising a bulb, a nozzle at the outlet e id oli the bulb, a litl'ing at the intake end o'l the bulb, a shell nnrrouiulinz the litting. the said fitting being provide/'l with a longitudinal bore communia core fitted into the eating with the bulb.. bore in the 'fitting and into the rear end ot the shell. said core having` a passage extend- .in longitinliually there through and commun i farting with t-he bere in the fitting, the shell luivingan annular serien oil apertilres in its rear end, the fitting having a plurality ol" radial aperlliu's arranged near its rear end, a heating coil wound upon the core whereby air passing tllrough and around the core will be heated prior to its entrance into the bulb.

A dental chip blower comprising a bulb, a nozzle comiccted Alo the bulb and arranged in longitufflinal alignment therewith, an air heating` chamber zssociated with the nozzle and bulb, an electrical heating means within said chamber, said means being tubular to increase its radiating surface.

Signed at New York city.y New York, this lflth day oli April, 1919.

LEO SOBOL. GEORGE M. MARR.

llO 

